[douglas]

Note: If you have enough warp openers and/or time, there is an alternative way to prevent warp points being opened to your systems without making it so difficult to do it yourself. If there are 10 warp points already in a system, no more can be opened. If you can set up 10 warp points in every system you have, no one else will be able to open warp points from the outside, but you will be able to close some warp points and reopen them to different destinations in the same turn if you're careful and plan and time it just right.